E.g. [link|http://www.insidesarbanesoxley.com/sarbanes_oxley_blog/|Inside Sarbanes-Oxley] is a blog with recent articles. It shows up as #2 in a Google search for "sarbanes oxley blog". But it has no comments in any of the articles on the front page.
Similarly, the first [link|http://hipaablog.blogspot.com/|HIPAA blog] that I found lists no comments.
I think the secret to build traffic is to discuss something that shows up in a Google search (like SSL on the AS/400) or get traffic here from another site. My guess is that most who are concerned about SOX and HIPAA are much more comfortable with letting lawyers handle the issues than talking about them on public forums. I suspect it'll take years for that to change.
My $0.02.
Cheers,
Scott.